36. Would you mind not smoking in the office?
37. The children said they were waiting for the school bus.
38. Recycled plastic was used to make toys
39. It’s impossible that roses can grow in such poor ground.
40. This machine hasn’t been used for years.
41. My friend asked if I was going to leave the following day.
42. Some aid was sent to earthquake victims.
43. Radio waves were discovered by Heinrich Hertz.
44. Some food had been bought before the trip.
45. Our window is going to be repaired by my father tomorrow.
46. More trees should be planted to prevent some natural disasters.
47. Many houses and buildings were hit by a tornado.
48. If he didn't speak so quickly, we could understand him
49. We don't trust her because of her bad behavior.
50. In spite of taking a taxi, he still arrived late for school.
51. It took more time to communicate with each other in the past.
52. Letters used to be written to keep in touch with her.